Importance

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Abstract

A digital image signal is coded into an intra-picture component I, a forward predictively component P, and a bidirectionally predictively component B. These components are then time divisionally multiplexed. A process flag is attached to the intra-picture component to identify it, and then recorded. The recorded tape is scanned during reproduction so as to read the coded data at either a normal operating speed or a higher operating speed (equal to the normal operating speed multiplied by a speed multiplying coefficient). During reproduction, when the process flag is detected, the speed at which reproduction occurs is adjusted so as to assure that at least the intra-picture component of the image signal will be accurately reproduced. The reproduced data can then be output in a fixed period in correspondence to the speed multiplying number that determines the current operating speed of the apparatus. In a second embodiment, a digital image signal comprising coded data is separated into low and high region components, which time divisionally are multiplexed together and recorded onto magnetic tape. During recording, the coded data is arranged in units corresponding to image planes of the signal, with each image plane being recorded at an allocated position on the tape. An arranging means further assures that the low region components are recorded in a one-to-one correspondence with each of the units of the signal corresponding to an image plane.

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First Claim